I told my 11yo dd to stop after doing math for 45 minutes. She ignored that and continued in her favorite method of doing math — procrastinate, fight, and then cry about being stupid.
So, then I started sitting next to her and helping her through the new stuff (we use CLE) and the first review problem or two. Then, I’d get up, but stay in the same room so that she’d ask for my help. And, I made it a point to drop what I was doing and immediately help her with whatever problem was stumping her. And we’d stop after 45 minutes of this.
Then one day, she set the timer and did the lesson – she needed some help (I explained those problems) – and realized that the CLE math lesson only took 30 minutes when she worked diligently.
And then Christmas break happened………. *L*